the related function gsm0808_create_clear_command2() was introduced without any unit test coverage.

the feature in osmo-msc was developed / added before having a TTCN-3 testcase in place

It saddens me a bit that >= 1.5 years after introducing test-driven development we still see those kind of issues slipping into master. We need to work together to improve our processes. This doesn't only affect the developer, but also the reviewers. We should have spotted the missing unit test during review.